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feat(vpn): fully replace Mullvad VPN with Tailscale

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This commit is contained in:
Felix Schröter 2024-01-06 03:06:53 +01:00
parent 5fe226434d
commit 4c32137982
Signed by: felschr
GPG key ID: 671E39E6744C807D
9 changed files with 28 additions and 88 deletions

23
system/server.nix
View file

@ -1,29 +1,8 @@
{ config, pkgs, ... }:
{ ... }:
{
imports = [ ./common.nix ./vpn.nix ];
# use xserver without display manager
services.xserver.displayManager.startx.enable = true;
# Allow web server to be accessible outside of Mullvad VPN
networking.firewall.extraCommands = ''
${pkgs.nftables}/bin/nft -f ${
pkgs.writeText "mullvad-incoming" ''
table inet allow-incoming-traffic {
chain allow-incoming {
type filter hook input priority -100; policy accept;
tcp dport {80, 443} ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
udp dport {80, 443} ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
}
chain allow-outgoing {
type route hook output priority -100; policy accept;
tcp sport {80, 443} ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
udp sport {80, 443} ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
}
}
''
}
'';
}

71
system/vpn.nix
View file

@ -1,67 +1,30 @@
{ config, pkgs, ... }:
{ config, lib, ... }:
let tailscaleInterface = config.services.tailscale.interfaceName;
let
cfg = config.services.tailscale;
tailscaleInterface = cfg.interfaceName;
in {
age.secrets.mullvad.file = ../secrets/mullvad.age;
networking.wireguard.enable = true;
networking.firewall.trustedInterfaces = [ tailscaleInterface ];
services.tailscale = {
enable = true;
# authKeyFile = ; # TODO add this to create auto-connect systemd job
authKeyFile = "/dummy";
openFirewall = true;
useRoutingFeatures = "both";
extraUpFlags = [
"--reset"
"--accept-routes"
"--exit-node=de-ber-wg-004.mullvad.ts.net"
"--exit-node-allow-lan-access"
];
};
services.mullvad-vpn.enable = true;
# set some options after every daemon start
# to avoid accidentally leaving unsafe settings
systemd.services."mullvad-daemon" = {
serviceConfig.LoadCredential =
[ "account:${config.age.secrets.mullvad.path}" ];
postStart = ''
while ! ${pkgs.mullvad}/bin/mullvad status >/dev/null; do sleep 1; done
${pkgs.mullvad}/bin/mullvad lockdown-mode set on
${pkgs.mullvad}/bin/mullvad auto-connect set on
${pkgs.mullvad}/bin/mullvad dns set default
${pkgs.mullvad}/bin/mullvad lan set allow
${pkgs.mullvad}/bin/mullvad tunnel set ipv6 on
${pkgs.mullvad}/bin/mullvad tunnel set wireguard --quantum-resistant=on
${pkgs.mullvad}/bin/mullvad relay set tunnel-protocol wireguard
${pkgs.mullvad}/bin/mullvad relay set location de ber
account="$(<"$CREDENTIALS_DIRECTORY/account")"
current_account="$(${pkgs.mullvad}/bin/mullvad account get | grep "account:" | sed 's/.* //')"
if [[ "$current_account" != "$account" ]]; then
${pkgs.mullvad}/bin/mullvad account login "$account"
fi
'';
};
# Exclude Tailscale from Mullvad VPN
networking.firewall.extraCommands = ''
${pkgs.nftables}/bin/nft -f ${
pkgs.writeText "mullvad-incoming" ''
table inet allow-tailscale {
chain exclude-dns {
type filter hook output priority -10; policy accept;
ip daddr 100.00.100.100 udp dport 53 ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
ip daddr 100.00.100.100 tcp dport 53 ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
}
chain exclude-outgoing {
type route hook output priority 0; policy accept;
ip daddr 100.64.0.0/10 ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
ip6 daddr fd7a:115c:a1e0::/48 ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
}
chain allow-incoming {
type filter hook input priority -100; policy accept;
iifname "${tailscaleInterface}" ct mark set 0x00000f41 meta mark set 0x6d6f6c65;
}
}
''
}
# call taiscale up without --auth-key
systemd.services.tailscaled-autoconnect.script = ''
status=$(${config.systemd.package}/bin/systemctl show -P StatusText tailscaled.service)
if [[ $status != Connected* ]]; then
${cfg.package}/bin/tailscale up ${lib.escapeShellArgs cfg.extraUpFlags}
fi
'';
}